CN107355321A - A kind of air cleaner - Google Patents
A kind of air cleaner Download PDFInfo
- Publication number
- CN107355321A CN107355321A CN201710801488.1A CN201710801488A CN107355321A CN 107355321 A CN107355321 A CN 107355321A CN 201710801488 A CN201710801488 A CN 201710801488A CN 107355321 A CN107355321 A CN 107355321A
- Authority
- CN
- China
- Prior art keywords
- staving
- air
- air cleaner
- air inlet
- baffle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000428 dust Substances 0.000 claims abstract description 48
- 238000002485 combustion reaction Methods 0.000 abstract description 22
- 238000001914 filtration Methods 0.000 abstract description 15
- 238000011045 prefiltration Methods 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000003749 cleanliness Effects 0.000 abstract description 3
- 230000006698 induction Effects 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 239000008187 granular material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a kind of air cleaner, including hollow staving, the staving internal clearance is provided with a filter core, space between the periphery of the filter core and staving revolution inwall forms an air inlet cavity, the front end of the staving is provided with along its vertical axis direction and is inclined to the inlet charge mouth of its side setting, the centrifugal rectifier structure that air is oriented to flowing to the back-end from the front end of the air inlet cavity along the hand of spiral is provided with described inlet chamber body, the rear end of the staving is communicated with the dust exhaustor of the air inlet cavity, the front end face of the staving is provided with the gas outlet connected with the centre bore of the filter core.The air cleaner of the present invention; it is compact-sized; filter body integrates pre-filter function; pre-filtering efficiency high; the air cleanliness of induction system of internal combustion engine can be effectively improved; there is good protective effect to internal combustion engine, greatly reduce the abrasion of each kinematic pair related components of internal combustion engine, improve the reliability and durability of internal combustion engine.
Description
Technical field
The present invention relates to field of internal combustion engine, more specifically, it relates to a kind of air cleaner.
Background technology
At present, air cleaner is the indispensable part of induction system of internal combustion engine, and the fresh air for entering engine is played
Filtering and the effect of purification, ensure the cleannes of air, to reduce the abrasion of each kinematic pair related components of internal combustion engine, in raising
The reliability and durability of combustion engine.
Traditional air cleaner design scheme, the body of air cleaner do not have pre-filter function, uniquely rely on filter core
Filtered, filter efficiency is low, and the working service cycle is short, and internal combustion engine is not played a very good protection.For traditional
Air cleaner design scheme, in order to make up the deficiency of air cleaner filter efficiency, often to install pre-cleaner structure additional in addition,
So as to cause cost to increase, and structure is not also compact.
The content of the invention
The technical problem to be solved in the present invention is the above-mentioned deficiency for prior art, and it is an object of the invention to provide one
Kind design is simple, compact-sized, integrates pre-filter function, the air cleaner of pre-filtering efficiency high.
To achieve the above object, the invention provides a kind of air cleaner, including hollow staving, in the staving between
Gap is provided with a filter core, and the space between the periphery of the filter core and staving revolution inwall forms an air inlet cavity, institute
The front end for stating staving is provided with along its vertical axis direction and is inclined to the inlet charge mouth of its side setting, described air inlet cavity
It is interior to be provided with air from the front end of the air inlet cavity along the centrifugal rectifier structure of hand of spiral guiding flowing to the back-end, it is described
The rear end of staving is communicated with the dust exhaustor of the air inlet cavity, and the front end face of the staving is provided with the center with the filter core
The gas outlet of hole connection.
Further, described centrifugal rectifier structure includes the encirclement filter core on the inside of the bucket wall of the staving
Cylindrical baffle that is that front end is set and being adapted with the air inlet, in addition to positioned at the cylindrical baffle and staving bucket
The slanting baffle tiltedly extanded rearward on the inside of the air inlet between wall, from the front end of the cylindrical baffle.
Further, described slanting baffle is that tiltedly protrusion is inwardly rolled on the periphery of the cylindrical baffle, its
Tilt angle alpha is 60 ° to 80 °.
Further, the angle β of the slanting baffle and staving central axis is 30 ° to 60 °.
Further, the angle β of the slanting baffle and staving central axis is 45 °.
As a further improvement, described cylindrical baffle is that vertical protrusion is set backward on the drive end bearing bracket of the staving
The annular slab put, cave inward on the housing of the staving provided with being overlapped with described cylindrical baffle and slanting baffle structure
Recessed structure, the staving and described cylindrical baffle and slanting baffle are formed in one structure.
Improved as further, described air inlet enters provided with what the housing for vertically protruding from the staving was set
Gas is taken over, and the center line extended line of the air inlet tube deviates from the center of circle setting of the staving cross section.
Further, the gas outlet is arranged at the center of the front end face of the staving, and described gas outlet is provided with
Vertically protrude from the outgoing gas connection tube that the front end face of the staving is set.
Improved as further, protruded after oblique on described staving and be provided with a dust discharge joint, described dust exhaustor
It is socketed on the dust discharge joint.
Further, the dust tank body that the tail end that the dust exhaustor includes being socketed on the dust discharge joint narrows, it is described
The dust tank body of dust exhaustor is provided with an operation handle.
Beneficial effect
Compared with prior art, air cleaner of the invention has the beneficial effect that：The air cleaner of the present invention, if
Meter is simple, and compact-sized, filter body integrates pre-filter function, pre-filtering efficiency high, can effectively improve internal combustion engine and enter
The air cleanliness of gas system, there is good protective effect to internal combustion engine, to reduce each kinematic pair related components of internal combustion engine
Abrasion, improve the reliability and durability of internal combustion engine；Passive dust discharge can be continued during pre-filtering, extend air-filtering
In the working service cycle of device, make internal combustion engine more safe in use and save worry；Avoid installing additional in addition in particular surroundings
Prefilter, therefore the cost of air-intake of combustion engine filtration system can be reduced, the adaptability of internal combustion engine is improved, improves internal combustion engine
Competitiveness, structure are more compact attractive in appearance.
Brief description of the drawings
Fig. 1 is the structural front view of the air cleaner of the present invention；
Fig. 2 is the structure left view of the air cleaner of the present invention；
Fig. 3 is the structure top view of the air cleaner of the present invention；
Fig. 4 is the structure sectional view in A-A directions in Fig. 3；
Fig. 5 is the structure sectional view at j in Fig. 4
Fig. 6 is the structural perspective of the air cleaner of the present invention.
In figure：1st, staving；2nd, filter core；3rd, air inlet cavity；4th, air inlet；5th, slanting baffle；6th, dust exhaustor；7th, gas outlet；8、
Dust discharge joint；9th, operation handle；10th, cylindrical baffle；11st, air inlet tube；12nd, outgoing gas connection tube；13rd, concave inward structure.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of the present invention is described in detail, it is to be understood that the guarantor of the present invention
Shield scope is not limited by embodiment.
The embodiment of the present invention is such：As Figure 1-5, a kind of air cleaner, including hollow bucket
Body, the internal clearance of staving 1 are provided with a filter core 2, and the space that the periphery and staving 1 of filter core 2 are turned round between inwall forms an air inlet
Cavity 3, the front end of staving 1 are provided with along its vertical axis direction and are inclined to the inlet charge mouth 4 of its side setting, air inlet cavity
The centrifugal rectifier structure that air is oriented to flowing to the back-end from the front end of air inlet cavity 3 along the hand of spiral, staving 1 are provided with 3
Rear end be communicated with the dust exhaustor 6 of air inlet cavity 3, the front end face of staving 1 is provided with the outlet connected with the centre bore of filter core 2
Mouth 7.Overall manufactured using engineering plastics, easy to assembly, the sheet of air cleaner assembled by multiple engineering plastic materials and parts
Internal portion is integrated with centrifugal rectifier structure, has pre-filter function, makes air draught in air inlet by centrifugal rectifier structure
Spinned in cavity 3 motion, the larger dust granule of quality carries out screw close to internal face under the influence of centrifugal force, can
So that the solid particles such as the larger dust of quality in air to be ceaselessly gathered in the rear end of air cleaner inner chamber along the inwall of staving 1
Face, and be discharged outside eventually through the dust exhaustor 8 below rear end, therefore the larger dust granule of quality in air is served pre-
The effect of filtering.And pass through pre-filtered air, the filter paper layer through filter core carries out the center cavity of inflow filter core after fine filtering
It is interior, (during actual use, one or more filter core layers can be used as the case may be), clean air from filter core center cavity again
Discharged by the gas outlet of front end, this completes the whole working cycle process of air cleaner, substantially increase air
The filter efficiency of cleaner, pre-filtering efficiency can be up to (70~85) %, so as to reduce dust of the absorption on filter core 2
Grain, strengthen the service life of filter core 2, improve the air cleanliness into internal combustion engine；This air cleaner possesses pre-filter function
Afterwards, can be in order to avoid install prefilter additional in addition for internal combustion engine in general application scenario, therefore air-intake of combustion engine filtering system can be reduced
The cost of system, structure are more compact attractive in appearance.The air cleaner of the present invention, can continue passive dust discharge, prolong during pre-filtering
The working service cycle of air cleaner has been grown, has made internal combustion engine more safe in use and saves worry.
In the present embodiment, the front end of encirclement filter core 2 that centrifugal rectifier structure is included on the inside of the bucket wall of staving 1 is set
And with air inlet 4 be adapted cylindrical baffle 10, include between 1 barrel of wall of cylindrical baffle 10 and staving, oneself
The front end of cylindrical baffle 10 tiltedly extands rearward to the slanting baffle 5 of the inner side of air inlet 4, cylindrical baffle 10, slanting baffle 5 and staving
An annular diversion cavity is formed between 1 housing.The air for making to enter from gas outlet 4 by the water conservancy diversion of cylindrical baffle 10 is along cylinder
The periphery of shape baffle plate 10 does the annularly flow of rotation at a high speed, will be same along the direction of slanting baffle 5 after colliding slanting baffle 5
When do tangential motion, make air to the back-end flow, i.e., air does the flowing of centrifugal spiral backward in air inlet cavity 3, knot
Structure is ingenious in design, is effectively separated the heavier dust solid in air by centrifugal force, good separating effect, and structure
Simply, easy to manufacture.
In the present embodiment, slanting baffle 5 is that tiltedly protrusion, its inclination angle are inwardly rolled on the periphery of cylindrical baffle 10
It is 60 ° to 80 ° to spend α.Tilted on the inside of the phase of slanting baffle 5, can prevent air from rushing at air inlet 4 and disturbing air to enter in air inlet cavity 3,
And 5 appropriate introversion of slanting baffle, a centripetal force can be applied to air, allow the relatively stable helical flow backward of air,
And dust granules heavier in air move backward along the inwall of staving 1 under the action of the centrifugal force, reduce air flow to dust
The interference of particle, further increase the pre-filtering efficiency of air cleaner.
In the present embodiment, according to the set location of slanting baffle 5 and for meet required for tangential force, slanting baffle 5 with
It is that air spins circulation movement in air inlet cavity 3 can be by air that the angle β of the central axis of staving 1, which is 30 ° to 60 °,
Most dust granules are separated, and the pre-filtering effect of air cleaner is good.
In the present embodiment, it is 45 ° in the angle β of slanting baffle 5 and the central axis of staving 1, the pre-filtering of air cleaner
Effect is preferable, moreover, the structure of cleaner is simpler, Yi Zao, is easy to assemble.
In the present embodiment, cylindrical baffle 10 is the annular slab that vertical protrusion is set backward on the drive end bearing bracket of staving 1,
Caved inward on the housing of staving 1 provided with the concave inward structure 13 that is overlapped with cylindrical baffle 10 and the structure of slanting baffle 5, staving 1 and
Cylindrical baffle 10 and slanting baffle 5 are formed in one structure.Cylindrical baffle 10 is protruded backward on the front end face of staving 1,
And concave inward structure 13, which makes to cave inward on the housing of staving 1, to be overlapped with cylindrical baffle 10 and in cylindrical baffle 10 and staving
Slanting baffle 5 is formed between 1 inwall, structure design is more ingenious, and simpler, compact, manufacture is more prone to, and is adapted to be integrally formed
Manufacture, structure are more solid and reliable.
In the present embodiment, air inlet 4 is provided with and vertically protrudes from the air inlet tube 11 that the housing of staving 1 is set, and
The center of circle that the center line extended line of air inlet tube 11 deviates from the cross section of staving 1 is set, the setting of air inlet tube 11 be easy to outside
Portion's structure connection, and air inlet tube 11 can be such that air enters from the eccentric position of staving 1, be easy to air in air inlet cavity 3
Inside do centrifugal rotation motion；Gas outlet 7 is arranged at the center of the front end face of staving 1, and gas outlet 7 is provided with and vertically protrudes from bucket
The outgoing gas connection tube 12 that the front end face of body 1 is set, helps the air in the centre bore of filter core 2 transferring to internal combustion engine.
In the present embodiment, oblique rear protrusion is provided with a dust discharge joint 8 on staving 1, and dust exhaustor 6 is socketed in dust discharge joint 8
On, dust discharge joint 8 and staving 1 are formed in one structure, easy to manufacture, are easy to process, while be easy to the reliable of dust exhaustor 6 to connect
Connect.
In the present embodiment, the dust tank body that the tail end that dust exhaustor 6 includes being socketed on dust discharge joint 8 narrows, can make
Dust granules are stored in the narrowed portion of dust tank body, and dust will not return in air inlet cavity 3 easily in the case of a shock；Dust discharge
The dust tank body of the dust exhaustor 6 of device 8 is provided with an operation handle 9, is easy to the dismounting of dust exhaustor 6 by operation handle 9, improves work
Efficiency.
It the above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, do not taking off
On the premise of from structure of the present invention, several modifications and improvements can also be made, these effects implemented all without the influence present invention
And practical applicability.
Claims (10)
1. a kind of air cleaner, including hollow staving (1), it is characterised in that staving (1) internal clearance is provided with a filter
Core (2), the space that the periphery and the staving (1) of the filter core (2) are turned round between inwall form an air inlet cavity (3), institute
The front end for stating staving (1) is provided with along its vertical axis direction and is inclined to the inlet charge mouth (4) of its side setting, and described enters
It is provided with air cavity (3) and air is oriented to the centrifugal of flowing to the back-end from the front end of the air inlet cavity (3) along the hand of spiral
Rectifier structure, the rear end of the staving (1) are communicated with the dust exhaustor (6) of the air inlet cavity (3), before the staving (1)
End face is provided with the gas outlet (7) connected with the centre bore of the filter core (2).
2. a kind of air cleaner according to claim 1, it is characterised in that described centrifugal rectifier structure includes position
It is that the encirclement filter core (2) front end on the inside of the bucket wall of the staving (1) is set and be adapted with the air inlet (4)
Cylindrical baffle (10), in addition between the cylindrical baffle (10) and staving (1) bucket wall, from the cylindrical baffle
(10) slanting baffle (5) that front end is tiltedly extanded rearward on the inside of the air inlet (4).
3. a kind of air cleaner according to claim 2, it is characterised in that described slanting baffle (5) is in the circle
Tiltedly protrusion is inwardly rolled on the periphery of cylindrical baffle (10), its tilt angle alpha is 60 ° to 80 °.
4. a kind of air cleaner according to claim 2, it is characterised in that the slanting baffle (5) and staving (1) center
The angle β of axis is 30 ° to 60 °.
5. a kind of air cleaner according to claim 4, it is characterised in that the slanting baffle (5) and staving (1) center
The angle β of axis is 45 °.
6. according to a kind of air cleaner described in claim 2-5 any one, it is characterised in that described cylindrical shape gear
Plate (10) is the annular slab that vertical protrusion is set backward on the drive end bearing bracket of the staving (1), on the housing of the staving (1) to
Sunken inside is provided with the concave inward structure (13) overlapped with described cylindrical baffle (10) and slanting baffle (5) structure, the staving (1)
It is formed in one structure with described cylindrical baffle (10) and slanting baffle (5).
7. a kind of air cleaner according to claim 6, it is characterised in that described air inlet (4) is provided with vertical
Protrude from the air inlet tube (11) that the housing of the staving (1) is set, and the center line extended line of the air inlet tube (11)
The center of circle for deviating from the staving (1) cross section is set.
8. a kind of air cleaner according to claim 6, it is characterised in that the gas outlet (7) is arranged on the bucket
At the center of the front end face of body (1), described gas outlet (7) are provided with the front end face setting for vertically protruding from the staving (1)
Outgoing gas connection tube (12).
9. a kind of air cleaner according to claim 7 or 8, it is characterised in that convex after oblique on described staving (1)
Go out to be provided with a dust discharge joint (8), described dust exhaustor (6) is socketed on the dust discharge joint (8).
10. a kind of air cleaner according to claim 9, it is characterised in that the dust exhaustor (6) includes being socketed in institute
The dust tank body that the tail end on dust discharge joint (8) narrows is stated, the dust tank body of the dust exhaustor (6) is provided with an operation handle
(9)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710801488.1A CN107355321A (en) | 2017-09-07 | 2017-09-07 | A kind of air cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710801488.1A CN107355321A (en) | 2017-09-07 | 2017-09-07 | A kind of air cleaner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107355321A true CN107355321A (en) | 2017-11-17 |
Family
ID=60291398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710801488.1A Pending CN107355321A (en) | 2017-09-07 | 2017-09-07 | A kind of air cleaner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107355321A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050063A (en) * | 2018-01-12 | 2018-05-18 | 东莞市富威压缩机科技有限公司 | A kind of mute frequency conversion screw air compressor |
| CN110469435A (en) * | 2019-09-12 | 2019-11-19 | 中国北方车辆研究所 | Testable armored vehicle air cleaner |
| CN114207267A (en) * | 2019-08-07 | 2022-03-18 | 卡特彼勒公司 | Actuating an air filter dust valve |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07269427A (en) * | 1994-03-31 | 1995-10-17 | Tsuchiya Mfg Co Ltd | Centrifugal air cleaner |
| JPH09242625A (en) * | 1996-03-08 | 1997-09-16 | Komatsu Ltd | Cyclone type air cleaner |
| US6149700A (en) * | 1999-01-29 | 2000-11-21 | Nelson Industries, Inc. | Increased flow capacity filter |
| JP2002089380A (en) * | 2000-07-07 | 2002-03-27 | Hitachi Constr Mach Co Ltd | Construction machinery |
| CN102958581A (en) * | 2010-09-16 | 2013-03-06 | 康明斯过滤Ip公司 | Filter element with features to improve pre-cleaning performance, sealing, and structural support |
| CN203420800U (en) * | 2013-07-16 | 2014-02-05 | 浙江环球滤清器有限公司 | Dedusting fastening type air filter |
| CN204113502U (en) * | 2014-09-23 | 2015-01-21 | 上汽依维柯红岩商用车有限公司 | Air cleaner assy |
| CN106555716A (en) * | 2015-09-25 | 2017-04-05 | 湖北申龙进气系统有限公司 | Gradual denoising air filter |
| CN207145094U (en) * | 2017-09-07 | 2018-03-27 | 广西玉柴机器股份有限公司 | A kind of air cleaner |
-
2017
- 2017-09-07 CN CN201710801488.1A patent/CN107355321A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07269427A (en) * | 1994-03-31 | 1995-10-17 | Tsuchiya Mfg Co Ltd | Centrifugal air cleaner |
| JPH09242625A (en) * | 1996-03-08 | 1997-09-16 | Komatsu Ltd | Cyclone type air cleaner |
| US6149700A (en) * | 1999-01-29 | 2000-11-21 | Nelson Industries, Inc. | Increased flow capacity filter |
| JP2002089380A (en) * | 2000-07-07 | 2002-03-27 | Hitachi Constr Mach Co Ltd | Construction machinery |
| CN102958581A (en) * | 2010-09-16 | 2013-03-06 | 康明斯过滤Ip公司 | Filter element with features to improve pre-cleaning performance, sealing, and structural support |
| CN203420800U (en) * | 2013-07-16 | 2014-02-05 | 浙江环球滤清器有限公司 | Dedusting fastening type air filter |
| CN204113502U (en) * | 2014-09-23 | 2015-01-21 | 上汽依维柯红岩商用车有限公司 | Air cleaner assy |
| CN106555716A (en) * | 2015-09-25 | 2017-04-05 | 湖北申龙进气系统有限公司 | Gradual denoising air filter |
| CN207145094U (en) * | 2017-09-07 | 2018-03-27 | 广西玉柴机器股份有限公司 | A kind of air cleaner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050063A (en) * | 2018-01-12 | 2018-05-18 | 东莞市富威压缩机科技有限公司 | A kind of mute frequency conversion screw air compressor |
| CN114207267A (en) * | 2019-08-07 | 2022-03-18 | 卡特彼勒公司 | Actuating an air filter dust valve |
| CN110469435A (en) * | 2019-09-12 | 2019-11-19 | 中国北方车辆研究所 | Testable armored vehicle air cleaner |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171117 |
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| RJ01 | Rejection of invention patent application after publication |